关键词: 数字水印, 水印稳健性, 水印透明性, 半盲检测, 加密存储文档

Abstract: A robust watermarking technology with high transparency is proposed in this paper.It improves the method of embedding watermark by adopting EMD technology.The proposed method provides high embedding efficiency that is better than previous watermarking technologies.The high efficiency of embedding makes the scheme obtain a great balance which is very robust with high transparency.The scheme enables to resist on all kinds of unintentional or intentional attacks especially on Internet.It is a half-blind watermarking method without needing of origin watermark’s participation in the process of extraction.The visual system of human being is introduced in this method to improve the invisibility of watermarks.The results of experiments prove that the arithmetic has great advantages comparing with others watermarking technologies.

Key words: watermarking, robustness, transparency, half-blind detecting, encrypted document